That’s not quite right as there is some fixed overhead at both ends of the cells which does not contribute to capacity. I have not taken any cells apart but looking at the top, I’d say it’s at least 5mm of waste. So 300/600 would be a more realistic ratio.
Also, as this provides 15A (barely) in half the capacity, it should probably be compared to a 18650 which provides 30A. Perhaps a VCT5 would be a better basis.
So while there is likely still some room for improvement, it’s probably not that much.
Maybe I’m wrong here, but I would think there will be some volume in any cell that is lost to overhead mechanisms not used for energy storage, so that a 18350 will never achieve the theoretical maximum capacity with relation to its size compared to what’s possible in a 18650 (haven’t had my morning coffee so I hope I’m making sense).
By the same token, if there’s a 18950 format, then it would hold much more energy to make 18650 look unimpressive, due to the same volume of overhead across all cell formats.
The company that manufactures these batteries is YDL.
The same company also manufactures the Aspire 18650 batteries of 1800-2500mAh, as well as the 26650 of 4300mAh.
YDL is the company that deals most with Lipo batteries.
Many daily use devices have batteries of this company.
Most EGO devices used by vapers have batteries from this company.
Have shown good behavior, but of course there are those who did not see good performance ……
But most are happy with the performance of these batteries.
I managed to use the 2500mAh and unfortunately as a performance I did not see anything superior to the well-known 18650 of the big manufacturers.
At the 22A operating mode, the battery showed poor performance and increased temperature.
It was not a measurement to be able to have a clear performance picture, but compared to the Samsung SDIEM INR18650 25R5 2500mAh 20A, it was inferior.
The 18350, however, seems to be a good construction and is probably the most efficient battery of this size today.
But comparing an 18650 to an 18350, is totally invalid.
The 18350 is manufactured for smaller devices, so we will have less performance.
If it is worth buying or not, it is proportionate to each one’s needs.
I can get the cell with better price, but I can’t send to members directly, it is hard to send cells.
I can send all the cells to one,if someone can help
You couldn’t get cheap aluminum tubes to shop them in? Since batteries have to be in a device. You could start shipping batteries in a tube that looks like a flashlight. Maybe with s trash led and no driver. So it looks like a flashlight. I believe mtn electronics does something similisf for international orders. You should be able to ship batteries inside a product.
Thanks for the review once again! Just ordered qty 5 from http://online.aspirecig.com/. Shipping is confusing. Estimator said $10 for e-packet for qty 5, but placing the order, e-packet was $0... So I paid $20 via PayPal. Interesting what's gonna happen... I think their site is screwed up, so I might get free shipping or maybe they will cancel the order, or just never ship it.
Wow, got notice my order of 5 cells shipped for the $20 I paid. So for shipping, it quoted just over $10 for qty 5 with an e-packet, but placing the order, no charge for shipping. Hhmm.
I ordered 8 of the 18350’s, paid $20.60 for DHL, then got a partial refund of $15 as he couldn’t ship DHL (something about they wouldn’t take the batteries?) Then I got a second $15 refund by mistake and he asked me to pay that one back. Seems weird, but I did it. So now he is saying they will ship USPS? I’m confused (normal these days)